超好用的图片处理工具，可配合minio实现如阿里云的图片处理查询

Sergey Alexandrovich 0ad85b456b Update CHANGELOG.md		vor 6 Jahren
.circleci	4edf226cf8 Run tests in circle	vor 6 Jahren
docs	05f6412329 Update docs	vor 6 Jahren
examples	cca6bdaf06 Update Elixir example (#77)	vor 6 Jahren
vendor	b66b27bef9 Errors reporting	vor 6 Jahren
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.gitignore	7c7add8dc1 Enable s3 transport scheme	vor 6 Jahren
CHANGELOG.md	0ad85b456b Update CHANGELOG.md	vor 6 Jahren
Dockerfile	2c0b538eb5 GIF output support	vor 6 Jahren
Gopkg.lock	b66b27bef9 Errors reporting	vor 6 Jahren
Gopkg.toml	ceec679c81 Back to net/http because of fasthttps incompatibiliti with almost everything	vor 6 Jahren
LICENSE	0c006ce61e Initial commit	vor 8 Jahren
README.md	e023c3874d Big badges	vor 6 Jahren
app.json	06662561fa Make kay and salt optional in app.json	vor 6 Jahren
cmyk_profile.go	070346d155 Fix processing of CMYK without embedded profile	vor 7 Jahren
config.go	e8845f671b Limit GIF frames to being processed	vor 6 Jahren
crypt.go	9114f28c75 Multiple key/salt pairs support	vor 6 Jahren
crypt_test.go	9114f28c75 Multiple key/salt pairs support	vor 6 Jahren
download.go	917357616e Deprecate IMGPROXY_MAX_SRC_DIMENSION	vor 6 Jahren
errors.go	776f57d003 Predefine static errors	vor 6 Jahren
errors_reporting.go	b66b27bef9 Errors reporting	vor 6 Jahren
etag.go	ceec679c81 Back to net/http because of fasthttps incompatibiliti with almost everything	vor 6 Jahren
gcs_transport.go	00b690e93d Version IDs for S3 and generations for GCS	vor 6 Jahren
gzip.go	34a61d287f fasthttp; Optimized memory allocation	vor 6 Jahren
heroku.yml	d7cc247439 Deploy to Heroku with Docker (#50)	vor 7 Jahren
image_types.h	c5adf1b3a5 Rename processing options constants and move them to processing_options.go	vor 6 Jahren
logo.svg	1e2ee1df22 Logo	vor 7 Jahren
main.go	962b4c8f44 Bump version	vor 6 Jahren
main_test.go	6b7551213f Tests	vor 6 Jahren
newrelic.go	dd85087e6a Prometheus metrics	vor 6 Jahren
presets.go	6b7551213f Tests	vor 6 Jahren
presets_test.go	6b7551213f Tests	vor 6 Jahren
process.go	e8845f671b Limit GIF frames to being processed	vor 6 Jahren
processing_options.go	c3852d683d Optimal and correct DPR support	vor 6 Jahren
processing_options_test.go	9114f28c75 Multiple key/salt pairs support	vor 6 Jahren
prometheus.go	08c9077fe4 Don;t launch Prometheus server if Prometheus binding is not provided	vor 6 Jahren
s3transport.go	00b690e93d Version IDs for S3 and generations for GCS	vor 6 Jahren
server.go	c03a9c69c3 Move health response before semaphore	vor 6 Jahren
timer.go	dd85087e6a Prometheus metrics	vor 6 Jahren
utils.go	8c4a561b9e Focus point gravity	vor 6 Jahren
vips.h	5985747aa6 Put vips error when something is not supported just in case	vor 6 Jahren
watermark_data.go	3d98a943a4 Watermark	vor 6 Jahren

imgproxy

<img align="right" width="200" height="200" title="imgproxy logo"

 src="https://cdn.rawgit.com/DarthSim/imgproxy/master/logo.svg">

imgproxy is a fast and secure standalone server for resizing and converting remote images. The main principles of imgproxy are simplicity, speed, and security.

imgproxy can be used to provide a fast and secure way to replace all the image resizing code of your web application (like calling ImageMagick or GraphicsMagick, or using libraries), while also being able to resize everything on the fly, fast and easy. imgproxy is also indispensable when handling lots of image resizing, especially when images come from a remote source.

imgproxy does one thing — resizing remote images — and does it well. It works great when you need to resize multiple images on the fly to make them match your application design without preparing a ton of cached resized images or re-doing it every time the design changes.

imgproxy is a Go application, ready to be installed and used in any Unix environment — also ready to be containerized using Docker.

See this article for a good intro and all the juicy details! imgproxy: Resize your images instantly and securely

Simplicity

"No code is better than no code."

imgproxy only includes the must-have features for image processing, fine-tuning and security. Specifically,

It would be great to be able to rotate, flip and apply masks to images, but in most of the cases, it is possible — and is much easier — to do that using CSS3.
It may be great to have built-in HTTP caching of some kind, but it is way better to use a Content-Delivery Network or a caching proxy server for this, as you will have to do this sooner or later in the production environment.
It might be useful to have everything built in — such as HTTPS support — but an easy way to solve that would be just to use a proxying HTTP server such as nginx.

Speed

imgproxy uses probably the most efficient image processing library there is, called libvips. It is screaming fast and has a very low memory footprint; with it, we can handle the processing for a massive amount of images on the fly.

imgproxy also uses native Go's net/http routing for the best HTTP networking support.

Security

Massive processing of remote images is a potentially dangerous thing, security-wise. There are many attack vectors, so it is a good idea to consider attack prevention measures first. Here is how imgproxy can help:

imgproxy checks image type and "real" dimensions when downloading, so the image will not be fully downloaded if it has an unknown format or the dimensions are too big (there is a setting for that). That is how imgproxy protects you from so called "image bombs" like those described at https://www.bamsoftware.com/hacks/deflate.html.
imgproxy protects image URLs with a signature, so an attacker cannot cause a denial-of-service attack by requesting multiple image resizes.
imgproxy supports authorization by an HTTP header. That prevents using imgproxy directly by an attacker but allows to use it through a CDN or a caching server — just by adding a header to a proxy or CDN config.

Documentation

Author

Sergey "DarthSim" Alexandrovich

Many thanks to Roman Shamin for the awesome logo.

Great bunch of kudos goes to John Cupitt who develops libvips and helps me to optimize its usage under the hood of imgproxy.

License

imgproxy is licensed under the MIT license.

See LICENSE for the full license text.

README.md